A floodplain is an area adjacent a stream or river that experiences flooding during periods of high discharge. These ecosystems can be very rich in both quantity and diversity of organisms and can contain up to 1,000 times more species than a river. Many floodplains have been compromised by the construction of levees, pollution, and the draining of wetlands and marshes. A restoration project that focuses its efforts on the removal of levees and the improvement of water quality, is a plan focused on
A. restoration of species.
B. restoration of ecosystem functioning.
B. restoration of ecosystem functioning.
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Which of the following statements is correct?
A. Global warming is the same as global climate change. B. Global climate change includes changes in patterns of rainfall, but not in patterns of temperature. C. Global climate change includes global warming, but also increased fires, changes habitats, and changes patterns of temperature and rainfall. D. Global climate change has no effects of human populations.
Which of the following is not a component of a polymerase chain reaction (PCR)?
A. dNTPs B. DNA containing the sequences to be amplified C. primers complementary to each end of the sequence to be amplified D. heat stable Taq polymerase E. DNA ligase to connect the fragments together
The equation AB + H2O ? A + B would be catalyzed by which of the following classes of enzymes?
A) oxidoreductases B) transferases C) hydrolases D) ligases E) isomerases
Most atmospheric oxygen comes from photosynthesis. From which of the following molecules is the oxygen derived?
A. carbon dioxide B. chlorophyll b C. chlorophyll a D. glucose E. water